reactions.list

Facts

Method URL: https://slack.com/api/reactions.list

Preferred HTTP method: GET

Accepted content types: application/x-www-form-urlencoded

Rate limiting: Tier 2

Works with:

Token type	Required scope(s)
bot	`bot`
user	`reactions:read`

This method returns a list of all items (file, file comment, channel message, group message, or direct message) reacted to by a user.

Arguments

Argument	Example	Required	Description
`token`	`xxxx-xxxxxxxxx-xxxx`	Required	Authentication token bearing required scopes.
`count`	`20`	Optional, default=100	Number of items to return per page.
`cursor`	`dXNlcjpVMDYxTkZUVDI=`	Optional	Parameter for pagination. Set `cursor` equal to the `next_cursor` attribute returned by the previous request's `response_metadata`. This parameter is optional, but pagination is mandatory: the default value simply fetches the first "page" of the collection. See pagination for more details.
`full`	`true`	Optional	If true always return the complete reaction list.
`limit`	`20`	Optional, default=0	The maximum number of items to return. Fewer than the requested number of items may be returned, even if the end of the list hasn't been reached.
`page`	`2`	Optional, default=1	Page number of results to return.
`user`	`W1234567890`	Optional	Show reactions made by this user. Defaults to the authed user.

Present arguments as parameters in application/x-www-form-urlencoded querystring or POST body. This method does not currently accept application/json.

Response

The response contains a list of items with reactions followed by pagination information.

Typical success response

{
    "items": [
        {
            "type": "message",
            "channel": "C3UKJTQAC",
            "message": {
                "bot_id": "B4VLRLMKJ",
                "reactions": [
                    {
                        "count": 1,
                        "name": "robot_face",
                        "users": [
                            "U2U85N1RV"
                        ]
                    }
                ],
                "subtype": "bot_message",
                "text": "Hello from Python! :tada:",
                "ts": "1507849573.000090",
                "username": "Shipit Notifications"
            }
        },
        {
            "comment": {
                "type": "file_comment",
                "comment": "This is a file comment",
                "created": 1508286096,
                "id": "Fc7LP08P1U",
                "reactions": [
                    {
                        "count": 1,
                        "name": "white_check_mark",
                        "users": [
                            "U2U85N1RV"
                        ]
                    }
                ],
                "timestamp": 1508286096,
                "user": "U2U85N1RV"
            },
            "file": {
                "channels": [
                    "C2U7V2YA2"
                ],
                "comments_count": 1,
                "created": 1507850315,
                "reactions": [
                    {
                        "count": 1,
                        "name": "stuck_out_tongue_winking_eye",
                        "users": [
                            "U2U85N1RV"
                        ]
                    }
                ],
                "title": "computer.gif",
                "user": "U2U85N1RV",
                "username": ""
            }
        },
        {
            "file": {
                "channels": [
                    "C2U7V2YA2"
                ],
                "comments_count": 1,
                "created": 1507850315,
                "id": "F7H0D7ZA4",
                "name": "computer.gif",
                "reactions": [
                    {
                        "count": 1,
                        "name": "stuck_out_tongue_winking_eye",
                        "users": [
                            "U2U85N1RV"
                        ]
                    }
                ],
                "size": 1639034,
                "title": "computer.gif",
                "user": "U2U85N1RV",
                "username": ""
            },
            "type": "file"
        }
    ],
    "ok": true,
    "response_metadata": {
        "next_cursor": "dGVhbTpDMUg5UkVTR0w="
    }
}

Typical error response

{
    "ok": false,
    "error": "invalid_auth"
}

Different item types can be reacted to. Every item in the list has a type property, the other properties depend on the type of item. The possible types are:

message: the item will have a message property containing a message object and a channel property containing the channel ID for the message.
file: this item will have a file property containing a file object.
file_comment: the item will have a file property containing the file object and a comment property containing the file comment.

The users array in the reactions property might not always contain all users that have reacted (we limit it to X users, and X might change), however count will always represent the count of all users who made that reaction (i.e. it may be greater than users.length). If the authenticated user has a given reaction then they are guaranteed to appear in the users array, regardless of whether count is greater than users.length or not. If the complete list of users is required they can still be obtained by specifying the full argument.

The paging information contains the count of items returned, the total number of items reacted to, the page of results returned in this response and the total number of pages available. Please note that the max count value is 1000 and the max page value is 100.

Errors

This table lists the expected errors that this method could return. However, other errors can be returned in the case where the service is down or other unexpected factors affect processing. Callers should always check the value of the ok params in the response.

Error	Description
`user_not_found`	Value passed for `user` was invalid.
`not_authed`	No authentication token provided.
`invalid_auth`	Some aspect of authentication cannot be validated. Either the provided token is invalid or the request originates from an IP address disallowed from making the request.
`account_inactive`	Authentication token is for a deleted user or workspace.
`token_revoked`	Authentication token is for a deleted user or workspace or the app has been removed.
`no_permission`	The workspace token used in this request does not have the permissions necessary to complete the request. Make sure your app is a member of the conversation it's attempting to post a message to.
`org_login_required`	The workspace is undergoing an enterprise migration and will not be available until migration is complete.
`ekm_access_denied`	Administrators have suspended the ability to post a message.
`missing_scope`	The token used is not granted the specific scope permissions required to complete this request.
`invalid_arguments`	The method was called with invalid arguments.
`invalid_arg_name`	The method was passed an argument whose name falls outside the bounds of accepted or expected values. This includes very long names and names with non-alphanumeric characters other than `_`. If you get this error, it is typically an indication that you have made a very malformed API call.
`invalid_charset`	The method was called via a `POST` request, but the `charset` specified in the `Content-Type` header was invalid. Valid charset names are: `utf-8` `iso-8859-1`.
`invalid_form_data`	The method was called via a `POST` request with `Content-Type` `application/x-www-form-urlencoded` or `multipart/form-data`, but the form data was either missing or syntactically invalid.
`invalid_post_type`	The method was called via a `POST` request, but the specified `Content-Type` was invalid. Valid types are: `application/json` `application/x-www-form-urlencoded` `multipart/form-data` `text/plain`.
`missing_post_type`	The method was called via a `POST` request and included a data payload, but the request did not include a `Content-Type` header.
`team_added_to_org`	The workspace associated with your request is currently undergoing migration to an Enterprise Organization. Web API and other platform operations will be intermittently unavailable until the transition is complete.
`request_timeout`	The method was called via a `POST` request, but the `POST` data was either missing or truncated.
`fatal_error`	The server could not complete your operation(s) without encountering a catastrophic error. It's possible some aspect of the operation succeeded before the error was raised.

Warnings

This table lists the expected warnings that this method will return. However, other warnings can be returned in the case where the service is experiencing unexpected trouble.

Warning	Description
`missing_charset`	The method was called via a `POST` request, and recommended practice for the specified `Content-Type` is to include a `charset` parameter. However, no `charset` was present. Specifically, non-form-data content types (e.g. `text/plain`) are the ones for which `charset` is recommended.
`superfluous_charset`	The method was called via a `POST` request, and the specified `Content-Type` is not defined to understand the `charset` parameter. However, `charset` was in fact present. Specifically, form-data content types (e.g. `multipart/form-data`) are the ones for which `charset` is superfluous.